Dynamic management of concurrent access to shared computing resources

A computer program product comprising a non-transitory computer-readable storage medium storing instructions which, when executed by processing circuitry of a computing system, cause the processing circuitry to maintain shared resources of a computing system in consistent states while managing concurrent access to those shared resources by:

• instantiating, in memory of the computing system, a resource instance manager (“RIM”) configured to process commands acting on a particular shared resource, each command having subcommands acting on the particular shared resource;
• receiving by processing circuitry of the computing system, a set of predefined rules, each rule instructing the RIM how to control execution of commands in conjunction with each other;
• in response to receiving a request to execute a particular command, assigning the particular command to a queue position in a command queue maintained by the RIM based on (i) the set of predefined rules and (ii) a current set of commands acting on the shared resource, the queue position determining when the particular command is permitted to execute relative to other commands being managed by the RIM;
• and
• causing execution of a next command at a head position of the command queue according to a current command queue order;
• wherein the resource instance manager has an event queue in addition to the command queue, the event queue used to enqueue subcommands of commands permitted to begin execution by the RIM;
• wherein assigning the queue position to the particular command includes, in response to determining, using the set of predefined rules, that the particular command may be safely executed concurrently with other commands, assigning the particular command to the head position of the command queue, causing the command to transmit a first subcommand which is enqueued for execution in an event queue of the resource instance manager;
• wherein the instructions, when executed by the processing circuitry of the computing system, further cause the processing circuitry to the method further comprises instantiating a plurality of additional RIMs, each of the RIM and the additional RIMs (all together, the “set of RIMs”) being exclusively associated with a single respective shared resource distinct from all of the other RIMs of the set of RIMs, each RIM of the set of RIMs being configured to exclusively process commands acting on its respective associated shared resource;
• wherein each RIM of the set of RIMs is further configured to assign commands that act on that RIM's associated shared resource to a respective command queue maintained by that RIM;
• wherein instantiating the RIM is performed in response to receiving the request to execute the particular command;
• and
• wherein the instructions, when executed by the processing circuitry of the computing system, further cause the processing circuitry to, in response to detecting that a particular RIM of the set of RIMs is not actively needed to process requests acting on its respective associated shared resource, remove that particular RIM from the memory of the computing system.

A computing system for maintaining shared resources of a computing system in consistent states while managing concurrent access to those shared resources, the computing system comprising processing circuitry coupled to memory configured to:

• instantiate, in the memory, a resource instance manager (“RIM”) configured to process commands acting on a particular shared resource, each command having subcommands acting on the particular shared resource;
• receive a set of predefined rules, each rule instructing the RIM how to control execution of commands in conjunction with each other;
• in response to receiving a request to execute a particular command, assign the particular command to a queue position in a command queue maintained by the RIM based on (i) the set of predefined rules and (ii) a current set of commands acting on the shared resource, the queue position determining when the particular command is permitted to execute relative to other commands being managed by the RIM;
• and
• cause execution of a next command at a head position of the command queue according to a current command queue order;
• wherein the resource instance manager has an event queue in addition to the command queue, the event queue used to enqueue subcommands of commands permitted to begin execution by the RIM;
• wherein assigning the queue position to the particular command includes, in response to determining, using the set of predefined rules, that the particular command may be safely executed concurrently with other commands, assigning the particular command to the head position of the command queue, causing the command to transmit a first subcommand which is enqueued for execution in an event queue of the resource instance manager;
• wherein the processing circuitry coupled to the memory is further configured to instantiate a plurality of additional RIMs, each of the RIM and the additional RIMs (all together, the “set of RIMs”) being exclusively associated with a single respective shared resource distinct from all of the other RIMs of the set of RIMs, each RIM of the set of RIMs being configured to exclusively process commands acting on its respective associated shared resource;
• wherein each RIM of the set of RIMs is further configured to assign commands that act on that RIM's associated shared resource to a respective command queue maintained by that RIM;
• wherein instantiating the RIM is performed in response to receiving the request to execute the particular command;
• and
• wherein the processing circuitry coupled to the memory is further configured to, in response to detecting that a particular RIM of the set of RIMs is not actively needed to process requests acting on its respective associated shared resource, remove that particular RIM from the memory.